.box{
    overflow: hidden;
    background-color:black;
}

.container {
    max-width:80%;
    margin:0 auto;
    background-color: black;
}


.header {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-around;
    -webkit-box-align: start;
    align-items: flex-start;
    width:100%;
    position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    z-index: 2;
    height: 60px;
    /*background-color: #ececec;*/
    /*color: #292E35;*/
    background-color: #ffffff;
    color: #fff;
    transition:all .5s;
}

.header__logo {
    float: left;
    height: 40px;
    margin: 10px 0px 0px 10px;
    padding: 0px 0px 0px 50px;
    background: url("../image/logo.jpg") left top no-repeat;
    display: block;
    font-size: 18px;
    line-height: 40px;
}

.header__nav {
    float: right;
    position: relative;
}

.header__nav-item:hover {
    color: #f03131;
}

.header__nav-item {
    float: left;
    padding: 0 20px;
    font-size: 14px;
    display: inline-block;
    width: 60px;
    text-align: center;
    line-height: 40px;
}

.header__nav-item-tip {
    width: 60px;
    height: 2px;
    background: red;
    position: absolute;
    left: 20px;
    bottom: -2px;
}

.header__nav-item_custom_button {
    color: #fff;
    background: #FF4500;
    width: 60px;
    margin: 0 20px;
    border-radius: 5px;
}

.header__nav-item_custom_button:hover {
    color: #fff;
}

/* 第一屏模块 */

.screen-1 {
    color: lightyellow;
    height: 600px;
    background-color: black;
    text-align: center;
    background: url("../image/screen-1.jpg") no-repeat center bottom;
    background-size:cover;
    position: relative;
}

.screen-1__wrap {
    max-width: 100%;
    margin: 0px auto;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.screen-1__heading {
    width:35%;
    /*height:250px;*/
    position: absolute;
    top: 400px;
    left:60%;
    font-size: 26px;
}

/*第二屏模块*/

.screen-2 {
    color: lightyellow;
    height: 600px;
    background-color: black;
    /*margin-top:80px;*/
    text-align: center;
    background: url("../image/screen-2.jpg") no-repeat center bottom;
    background-size:cover;
    position: relative;
}

.screen-2__wrap {
    max-width: 100%;
    margin: 0px auto;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.screen-2__heading {
    width:35%;
    /*height:250px;*/
    position: absolute;
    top: 400px;
    left:60%;
    font-size: 26px;
}

/*第三屏模块*/

.screen-3 {
    color: lightyellow;
    height: 600px;
    background-color: black;
    text-align: center;
    background: url("../image/screen-3.jpg") no-repeat center bottom;
    background-size:cover;
    position: relative;
}

.screen-3__wrap {
    max-width: 100%;
    margin: 0px auto;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.screen-3__heading {
    width:35%;
    /*height:250px;*/
    position: absolute;
    top: 400px;
    left:60%;
    font-size: 26px;
}

/*第四屏模块*/

.screen-4 {
    color: lightyellow;
    height: 600px;
    background-color: black;
    text-align: center;
    background: url("../image/screen-4.jpg") no-repeat center bottom;
    background-size:cover;
    position: relative;
}

.screen-4__wrap {
    max-width: 100%;
    margin: 0px auto;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.screen-4__heading {
    width:35%;
    /*height:250px;*/
    position: absolute;
    top: 400px;
    left:60%;
    font-size: 26px;
}

/*第五屏模块*/
.screen-5 {
    /*margin-top:0px;*/
    color: lightyellow;
    height: 600px;
    background: url("../image/screen-5.jpg") no-repeat center bottom;
    background-size:cover;
    background-color: black;
    position: relative;
}


.screen-5__heading {
    position: absolute;
    width:80%;
    /*height:200px;*/
    font-size: 24px;
    top:200px;
    left:108px;
    text-indent:2em;
    line-height: 2em;
}

/*购买链接*/
.buy {
    height: 80px;
    width:100%;
    padding: 120px 0px;
    background: url(../image/bg-buy.jpg) no-repeat bottom center #2b333b;
    background-size:cover;
}

.buy__button:hover,
.buy__button {
    width: 200px;
    height: 80px;
    line-height: 80px;
    text-align: center;
    font-size: 24px;
    color: #fff;
    border-radius: 3px;
    margin: 0px auto;
    display: block;
    background-color: orangered;
    transition:all .5s;
}
.buy__button:hover{
    box-shadow: 0 10px 10px rgba(0,0,0,.5);
    transform:translate(0,-5px);
}

/*底部*/

/*.footer {
    height: 80px;
    line-height: 80px;
    background-color: #07111b;
    text-align: center;
    color: #fff;
}*/

/*大纲模块*/

.outline {
    position: fixed;
    padding: 5px 10px;
    bottom: 120px;
    right: 0;
    z-index: 1;
    background-color: #fff;
}

.outline__item {
    display: block;
    width: 50px;
    height: 40px;
    line-height: 40px;
    padding: 5px 0;
    background: rgb(255,255,255);
    margin: 5px 0px 0px;
    border-top: 1px solid #eee;
    text-align: center;
    color: #93999f;
}
.outline__item:first-child{
    border:none;
}
.outline__item_status_active{
    color: #000;
}
